Audio Signal Processing Apparatus

1. An audio signal processing apparatus comprising: a connection unit that connects with a removable lens unit; a microphone unit that acquires audio signal; an audio processor that processes the audio signal acquired by the microphone unit so as to reduce a driving noise of the removable lens unit; and a controller, wherein the audio processor performs a first reduction process and a second reduction process, wherein the audio processor, in the first reduction process, reduces the driving noise by using a signal which is generated based on an audio signal of previous or subsequent to a noise section of the driving noise, wherein the audio processor, in the second reduction process, reduces the driving noise by attenuating a part of the driving noise, wherein the controller detects a type of the connected removable lens unit, wherein the controller controls the audio processor to perform the first reduction process, in a case where the type of the connected removable lens unit is a first type lens unit, and wherein the controller controls the audio processor to perform the second reduction process, in a case where the type of the connected removable lens unit is a second type lens unit.

2. The audio signal processing apparatus according to claim 1 , wherein the controller controls the audio processor to perform the first reduction process or the second reduction process, based on a driving manner of the connected removable lens unit.

3. The audio signal processing apparatus according to claim 2 , wherein the controller controls the driving manner of the connected removable lens unit.

4. The audio signal processing apparatus according to claim 1 , wherein the first type lens unit is a lens unit which does not drive a driving member of the lens unit by micro-step driving.

5. The audio signal processing apparatus according to claim 1 , wherein the second type lens unit is a lens unit which drives a driving member of the lens unit by micro-step driving.

6. The audio signal processing apparatus according to claim 5 , wherein the controller controls the audio processor to perform the first reduction process or the second reduction process, based on a driving speed of the driving member.

7. The audio signal processing apparatus according to claim 6 , further comprising: a image pickup unit that picks up an image obtained by the connected removable lens unit, wherein the controller controls the driving speed of the driving member based on an image pickup setting.

8. The audio signal processing apparatus according to claim 1 , wherein the audio processor, in the first reduction process, replaces the audio signal of the noise section of the driving noise with the signal which is generated based on the audio signal of previous or subsequent to the noise section of the driving noise.

9. The audio signal processing apparatus according to claim 1 , wherein the audio processor, in the second reduction process, mutes the audio signal of the noise section of the driving noise.

10. The audio signal processing apparatus according to claim 1 , wherein the audio processor, in the second reduction process, reduces the audio signal, of the specific frequency, of the noise section of the driving noise.